A Super Bowl commercial for Ram trucks showed people helping others while the Rev. Dr. Martin Luther King Jr. extolled the virtues of service. At the end, the phrase “Built to Serve” was shown.The online blowback was swift for Ram on Sunday after the carmaker used a sermon given by the Rev. Dr. Martin Luther King Jr. as the voice-over for a Super Bowl ad.The general sentiment: Did the company really just use Dr. King’s words about the value of service to sell trucks?The commercial showed scenes of people helping others while Dr. King extolled the virtues of service. At the end, the phrase “Built to Serve” was shown on the screen, along with the Ram logo.“MLK wanted equal rights and for me to buy a Dodge Ram,” one Twitter userwrote. Anotherwrote: “Black people cant kneel and play football but MLK should be used to sell trucks during the super bowl. Unbelievable.”The response put Ram in a position that advertisers dread — misfiring with a commercial in the Super Bowl, which sells 30 seconds of airtime for upward of $5 million and is watched by more than 100 million people.“It’s the wrong mistake to make given everything that’s going on in the U.S. right now,” said Tim Calkins, a marketing professor at Northwestern University’s Kellogg School of Management. “There’s so much emotion right now around race in this country that this was a high-risk move, and clearly it’s not going over very well.”The ad came after a tumultuous year for the N.F.L., which had a national spotlight placed on football players who sat or kneeled during the national anthem, a controversial gesture meant to draw attention to racial oppression and police brutality against black Americans. President Trump sharply criticized the players, which heightened some of the rhetoric surrounding the protests.And while many advertisers release their ads before the game, Ram did not, which added to the social media maelstrom.“I think it was well intentioned, but they’re going to have a lot of explaining to do,” Mr. Calkins said. “They did not release this ahead of time, so they went for the surprise. They got that, but at the same time, they now have a big problem with feedback and people being upset.”Adding to the disconnect, the sermon in question, delivered exactly 50 years ago, touched on the danger of overspending on items like cars and discussed why people “are so often taken by advertisers.” That was not lost on the ad’s detractors.The King Center said on Twitterthat neither the organization nor the Rev. Bernice King, one of Dr. King’s daughters, is responsible for approving his “words or imagery for use in merchandise, entertainment (movies, music, artwork, etc) or advertisement.” It said that included the Super Bowl commercial.Ram approached Dr. King’s estate about using his voice in the commercial, said Eric D. Tidwell, the managing director of Intellectual Properties Management, the licenser of the estate.ensure it met our standard integrity clearances,” Mr. Tidwell said in a statement. “We found that the overall message of the ad embodied Dr. King’s philosophy that true greatness is achieved by serving others.”Fiat Chrysler Automobiles U.S., which owns Ram, said in a statement that it was honored to work with the group to celebrate Dr. King’s words about the value of service.“We worked closely with the representatives of the Martin Luther King Jr. estate to receive the necessary approvals, and estate representatives were a very important part of the creative process every step of the way,” the company said.Susan Credle, global chief creative officer of the agency FCB, marveled at the speed of the online backlash around the ad and said it showed the risks of wading into social commentary, especially during an event like the Super Bowl.“You get so crucified, so fast,” she said, adding, “We’re just in a place where we get called out on authenticity and people don’t want to be emotionally manipulated.”Margaret Johnson, chief creative officer of the agency Goodby Silverstein & Partners, was also surprised at how quickly the negative reaction coalesced online.“The intent was right but maybe the timing was wrong,” she said.